The Schneider Electric A9Z64440 is an all-current sensitive residual current circuit breaker (RCCB) designed for use in electrical installations. With a rated current of 40 A and a rated residual current of 300 mA, this 4-pole switch provides reliable protection against residual currents that can be caused by various electrical disturbances. The Type B-SI is particularly suitable for applications that exhibit smooth direct current residual currents, such as those generated by frequency converters or inverters. The switch operates at a supply voltage of 400 V AC and is suitable for use in single-phase or three-phase supply networks. Safety features include a mechanical fault indication (VisiTrip) and a safe contact indication (VisiSafe), which provide clear feedback on the device's status. The A9Z64440 meets relevant standards and offers easy installation as well as the option to connect additional auxiliary modules.

• Mechanical fault indication (VisiTrip) to show tripping due to residual current
• Safe contact indication (VisiSafe) to ensure voltage-free status on the outgoing side
• Double connection terminals for connection of cables or busbars from both sides
• Easy removal of the individual device with installed busbar thanks to front-accessible fastening element
• Type B-SI with integrated SI technology for greater resilience against electrical disturbances.